3D printing system with waste collection subsystem

1. A three-dimensional (3D) printing system for manufacturing a 3D article comprising:

a vessel configured to contain photocurable resin;

a fabrication subsystem configured to form the 3D article with layer-by-layer selective curing of the photocurable resin, the fabrication subsystem includes:

a build plate;

a build plate support structure; and

a vertical movement mechanism;

a waste collection subsystem attached to the build plate support structure and configured to capture partially polymerized resin as the build plate support structure moves in an upward direction; and

a controller configured to:

operate the vertical movement mechanism to translate the build plate support structure to a lower position;

operate the vertical movement mechanism to raise the waste collection subsystem up through the resin and to a position at which partially polymerized resin can be unloaded from the waste collection subsystem.

2. The three-dimensional (3D) printing system of claim 1 wherein the vessel has walls defining a generally rectangular lateral vessel area for containing the photocurable resin, the build plate having generally rectangular lateral extent that occupies a majority of the vessel area with a rectangular gap between the build plate and a wall of the vessel, the waste collection subsystem includes an intake that is positioned within the rectangular gap, as the build plate rises a portion of resin flows into the intake.

3. The three-dimensional (3D) printing system of claim 1 wherein the waste collection subsystem includes an intake that is supported along an edge of the build plate and a sieve container that is supported under the build plate, as the build plate rises resin flows into the intake and then through the sieve container.

4. The three-dimensional (3D) printing system of claim 3 wherein the intake is coupled to a conduit, the intake is relatively wider than the conduit, the conduit is coupled to the sieve container.

5. The three-dimensional (3D) printing system of claim 3 wherein the waste collection subsystem includes a conduit coupling the intake to the sieve container, as the build plate rises the resin flow vertically into the intake and then flows laterally from the conduit into the sieve container.

6. The three-dimensional (3D) printing system of claim 3 wherein the waste collection subsystem includes a conduit coupling the intake to the sieve container, the conduit including a check valve to prevent backflow of resin back out of the waste collection system when the build plate is not rising.

7. A method of operating a three-dimensional (3D) printing system that is configured to manufacturing a 3D article comprising:

providing:

a vessel configured to contain photocurable resin;

a fabrication subsystem configured to form the 3D article with layer-by-layer selective curing of the photocurable resin, the fabrication subsystem includes;

a build plate;

a build plate support structure; and

a vertical movement mechanism; and

a waste collection subsystem attached to the build plate support structure and configured to capture partially polymerized resin as the build plate support structure moves in an upward direction;

operating the vertical movement mechanism to translate the build plate support structure to a lower position; and

operating the vertical movement mechanism to raise the waste collection subsystem up through the resin and to a position at which partially polymerized resin can be unloaded from the waste collection subsystem.

8. The method of claim 7 wherein the vessel has walls defining a generally rectangular lateral vessel area for containing the photocurable resin, the build plate having generally rectangular lateral extent that occupies a majority of the vessel area with a rectangular gap between the build plate and a wall of the vessel, the waste collection subsystem includes an intake that is positioned within the rectangular gap, as the build plate rises a portion of resin flows into the intake.

9. The method of claim 7 wherein the waste collection subsystem includes an intake that is supported along an edge of the build plate and a sieve container that is supported under the build plate, as the build plate rises resin flows into the intake and then through the sieve container.

10. The method of claim 9 wherein the waste collection subsystem includes a conduit coupling the intake to the sieve container, as the build plate rises the resin flow vertically into the intake and then flows laterally from the conduit into the sieve container.

11. The method of claim 9 wherein the waste collection subsystem includes a conduit coupling the intake to the sieve container, the conduit including a check valve configured to prevent backflow of resin back out of the waste collection system when the build plate is not rising.